chore(contrib): bump coreos to v349.0.0

```
core@deis-1 ~ $ docker version
Client version: 1.0.0
Client API version: 1.12
Go version (client): go1.2
Git commit (client): 63fe64c
Server version: 1.0.0
Server API version: 1.12
Go version (server): go1.2
Git commit (server): 63fe64c
core@deis-1 ~ $ fleetctl --version
fleetctl version 0.4.0
core@deis-1 ~ $ etcdctl --version
etcdctl version 0.4.3
```
Works for me:

```
Step 12 : RUN apt-get install -yq lxc-docker-1.0
 ---> Running in 407f42cec93b
Reading package lists...
Building dependency tree...
Reading state information...
The following extra packages will be installed:
  git git-man less libasn1-8-heimdal libclass-isa-perl libcurl3-gnutls
  liberror-perl libgcrypt11 libgdbm3 libgnutls26 libgpg-error0
  libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal
  libheimntlm0-heimdal libhx509-5-heimdal libkrb5-26-heimdal libldap-2.4-2
  libp11-kit0 libroken18-heimdal librtmp0 libsasl2-2 libsasl2-modules
  libswitch-perl libtasn1-3 libwind0-heimdal netbase patch perl perl-base
  perl-modules
Suggested packages:
  git-daemon-run git-daemon-sysvinit git-doc git-el git-arch git-cvs git-svn
  git-email git-gui gitk gitweb rng-tools gnutls-bin libsasl2-modules-otp
  libsasl2-modules-ldap libsasl2-modules-sql libsasl2-modules-gssapi-mit
  libsasl2-modules-gssapi-heimdal ed diffutils-doc perl-doc
  libterm-readline-gnu-perl libterm-readline-perl-perl libpod-plainer-perl
The following NEW packages will be installed:
  git git-man less libasn1-8-heimdal libclass-isa-perl libcurl3-gnutls
  liberror-perl libgcrypt11 libgdbm3 libgnutls26 libgpg-error0
  libgssapi3-heimdal libhcrypto4-heimdal libheimbase1-heimdal
  libheimntlm0-heimdal libhx509-5-heimdal libkrb5-26-heimdal libldap-2.4-2
  libp11-kit0 libroken18-heimdal librtmp0 libsasl2-2 libsasl2-modules
  libswitch-perl libtasn1-3 libwind0-heimdal lxc-docker-1.0.0 netbase patch
  perl perl-modules
The following packages will be upgraded:
  perl-base
```